public NamenodeProtocolTranslatorPB(NamenodeProtocolPB rpcProxy)
{
/*
* Protobuf requests with no parameters instantiated only once
*/
this.rpcProxy = rpcProxy;
}
/// <exception cref="System.IO.IOException"/>
private NamenodeProtocol GetActiveNodeProxy()
{
if (cachedActiveProxy == null)
{
int rpcTimeout = conf.GetInt(DFSConfigKeys.DfsHaLogrollRpcTimeoutKey, DFSConfigKeys
.DfsHaLogrollRpcTimeoutDefault);
NamenodeProtocolPB proxy = RPC.WaitForProxy <NamenodeProtocolPB>(RPC.GetProtocolVersion
(typeof(NamenodeProtocolPB)), activeAddr, conf, rpcTimeout, long.MaxValue);
cachedActiveProxy = new NamenodeProtocolTranslatorPB(proxy);
}
System.Diagnostics.Debug.Assert(cachedActiveProxy != null);
return(cachedActiveProxy);
}
/// <exception cref="System.IO.IOException"/>
private static NamenodeProtocol CreateNNProxyWithNamenodeProtocol(IPEndPoint address
, Configuration conf, UserGroupInformation ugi, bool withRetries)
{
NamenodeProtocolPB proxy = (NamenodeProtocolPB)CreateNameNodeProxy(address, conf,
ugi, typeof(NamenodeProtocolPB));
if (withRetries)
{
// create the proxy with retries
RetryPolicy timeoutPolicy = RetryPolicies.ExponentialBackoffRetry(5, 200, TimeUnit
.Milliseconds);
IDictionary <string, RetryPolicy> methodNameToPolicyMap = new Dictionary <string, RetryPolicy
>();
methodNameToPolicyMap["getBlocks"] = timeoutPolicy;
methodNameToPolicyMap["getAccessKeys"] = timeoutPolicy;
NamenodeProtocol translatorProxy = new NamenodeProtocolTranslatorPB(proxy);
return((NamenodeProtocol)RetryProxy.Create <NamenodeProtocol>(translatorProxy, methodNameToPolicyMap
));
}
else
{
return(new NamenodeProtocolTranslatorPB(proxy));
}
}
